//SN110 Simple Railroad signal automation
/*
Modified from Blink and DigitalPullup Example code by Paul Bradt
Turns on a system of five light bulbs or LEDs using a switch
and then sequences to the next bulb ultimately cycling back to
first bulb. This can simulate a model railroad signal sequence.
*/
// The setup function runs once when you press reset or power the board
void setup() {
/* initialize digital pins 4, 5, 10, 11, and 12 as outputs. 2 as input pullup pin.
Input as Pullup does not require external resistor but reverses the logic. */
pinMode(4, OUTPUT); //Green Sig2
pinMode(5, OUTPUT); //Red Sig 2
pinMode(10, OUTPUT); //Red Sig1
pinMode(11, OUTPUT); //Yellow Sig1
pinMode(12, OUTPUT); //Green Sig1
pinMode(2, INPUT_PULLUP);
}
/* The loop function runs forever waiting
for an input from switch
*/
void loop() {
if(digitalRead(2) == LOW){
lightSignal1();
}
}
//This loop cycles when switch pushed turning the lights off in sequence
void lightSignal1(){
digitalWrite(12, LOW); //Green Sig1
digitalWrite(10, HIGH); //Red Sig1
delay(6000); //Delay 6 seconds
digitalWrite(4, LOW); //Green Sig2
digitalWrite(5, HIGH); //Red sig2
delay(2000); //Delay 2 seconds
digitalWrite(10, LOW); //Red Sig1
digitalWrite(11, HIGH); //Yellow Sig1
delay(6000); //Delay 6 seconds
digitalWrite(11, LOW); //Yellow Sig1
digitalWrite(12, HIGH); //Green Sig1
delay(1000); //Delay 1 Second
digitalWrite(5, LOW); //Red Sig2
digitalWrite(4, HIGH); //Green sig2
}